How to implement event driven code in PHP?

Question

Is it possible to implement event driven program in PHP?

Something like javascript.

As an example, try to open a socket(open_socket) and execute some other command(do_something_else) instead of waiting for the success response of socket request. After getting the success response execute callback_execute.

//--------------------------------------------------------------------
public function open_socket(){
$this->socketResource = fsockopen($this->nodeIp,$this->portNumber);
}

public function callback_execute(){
fputs($this->socketResource,$command);
}

public function do_something_else{ xxxxx }
//--------------------------------------------------------------------

Non_blocking_function($obj->open_socket(),$obj->callback_execute());
$obj->do_something_else();

"implement code driven program," did you read your own writing? — Matt Ball
– Matt Ball, Commented Jan 16, 2012 at 20:17
possible duplicate of Event-Driven PHP Framework? see also stackoverflow.com/questions/6846118/… — Matt Ball
– Matt Ball, Commented Jan 16, 2012 at 20:17
Because PHP can't be multithreaded, I'm going to go out on a limb and say "No". It is possible to mimic this with a variety of horrible process forking solutions, but a better solution if you want to do this sort of thing is to use something that can be multithreaded or more closely mimic it, like Java or Node.js. — DaveRandom
– DaveRandom, Commented Jan 16, 2012 at 20:18
@MДΓΓ БДLL - i saw that question but answers doesn't give any hint. — P K
– P K, Commented Jan 16, 2012 at 20:18

Augustus Kling · Accepted Answer · 2012-01-16 20:29:19Z

3

There is only a single thread in PHP. Therefore doing something useful whilst waiting for some event is not possible in PHP.

Some workarounds are available but probably not very reliable – especially not when you plan to write portable code. I would assume the workarounds are risky since the language does not have a concept of concurrency. It's therefore probably best to write multi-threaded code in another language (Java, Scala, …) and use PHP just for displaying the prepared results (if using PHP at all for such problems).

answered Jan 16, 2012 at 20:29

Augustus Kling

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